TSTP Solution File: SET064-6 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET064-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n009.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 0s
% DateTime : Mon Jul 18 22:46:24 EDT 2022

% Result   : Unsatisfiable 1.02s 1.42s
% Output   : Refutation 1.02s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12  % Problem  : SET064-6 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.07/0.13  % Command  : bliksem %s
% 0.12/0.34  % Computer : n009.cluster.edu
% 0.12/0.34  % Model    : x86_64 x86_64
% 0.12/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.34  % Memory   : 8042.1875MB
% 0.12/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.34  % CPULimit : 300
% 0.12/0.34  % DateTime : Sat Jul  9 20:39:07 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 0.44/1.12  *** allocated 10000 integers for termspace/termends
% 0.44/1.12  *** allocated 10000 integers for clauses
% 0.44/1.12  *** allocated 10000 integers for justifications
% 0.44/1.12  Bliksem 1.12
% 0.44/1.12  
% 0.44/1.12  
% 0.44/1.12  Automatic Strategy Selection
% 0.44/1.12  
% 0.44/1.12  Clauses:
% 0.44/1.12  [
% 0.44/1.12     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.44/1.12     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.44/1.12     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ subclass( X, 'universal_class' ) ],
% 0.44/1.12     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.44/1.12     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.44/1.12     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.44/1.12     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.44/1.12     ) ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.44/1.12     ) ) ],
% 0.44/1.12     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.44/1.12     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.44/1.12     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.44/1.12     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.44/1.12    X, Z ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.44/1.12    Y, T ) ],
% 0.44/1.12     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.44/1.12     ), 'cross_product'( Y, T ) ) ],
% 0.44/1.12     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.44/1.12     ), second( X ) ), X ) ],
% 0.44/1.12     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.44/1.12    'universal_class' ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.44/1.12    Y ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.44/1.12    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.44/1.12    , Y ), 'element_relation' ) ],
% 0.44/1.12     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.44/1.12     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.44/1.12     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.44/1.12    Z ) ) ],
% 0.44/1.12     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.44/1.12    member( X, Y ) ],
% 0.44/1.12     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.44/1.12    union( X, Y ) ) ],
% 0.44/1.12     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.44/1.12    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.44/1.12    'symmetric_difference'( X, Y ) ) ],
% 0.44/1.12     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.44/1.12     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.44/1.12    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.44/1.12     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.44/1.12    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.44/1.12     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.44/1.12    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.44/1.12    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.44/1.12    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.44/1.12    Y ), rotate( T ) ) ],
% 0.44/1.12     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.44/1.12    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.44/1.12    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.44/1.12    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.44/1.12    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.44/1.12    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.44/1.12    Z ), flip( T ) ) ],
% 0.44/1.12     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.44/1.12    inverse( X ) ) ],
% 0.44/1.12     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.44/1.12     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.44/1.12    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.44/1.12     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.44/1.12    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.44/1.12     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.44/1.12     ],
% 0.44/1.12     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.44/1.12     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.44/1.12    'universal_class' ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.44/1.12    successor( X ), Y ) ],
% 0.44/1.12     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.44/1.12    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.44/1.12    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.44/1.12     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.44/1.12     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.44/1.12    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.44/1.12     [ inductive( omega ) ],
% 0.44/1.12     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.44/1.12     [ member( omega, 'universal_class' ) ],
% 0.44/1.12     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.44/1.12    , 'sum_class'( X ) ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.44/1.12    'universal_class' ) ],
% 0.44/1.12     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.44/1.12    'power_class'( X ) ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.44/1.12    'universal_class' ) ],
% 0.44/1.12     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.44/1.12    'universal_class' ) ) ],
% 0.44/1.12     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.44/1.12    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.44/1.12     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.44/1.12    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.44/1.12    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.44/1.12     ) ],
% 0.44/1.12     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.44/1.12    , 'identity_relation' ) ],
% 0.44/1.12     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.44/1.12    'single_valued_class'( X ) ],
% 0.44/1.12     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.44/1.12    'universal_class' ) ) ],
% 0.44/1.12     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.44/1.12    'identity_relation' ) ],
% 0.44/1.12     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.44/1.12     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.44/1.12    , function( X ) ],
% 0.44/1.12     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.44/1.12    X, Y ), 'universal_class' ) ],
% 0.44/1.12     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.44/1.12     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.44/1.12     ) ],
% 0.44/1.12     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.44/1.12     [ function( choice ) ],
% 0.44/1.12     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.44/1.12    apply( choice, X ), X ) ],
% 0.44/1.12     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.44/1.12     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.44/1.12     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.44/1.12    ,
% 0.44/1.12     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.44/1.12     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.44/1.12    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.44/1.12    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.44/1.12     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.44/1.12    'identity_relation' ) ],
% 0.44/1.12     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.44/1.12    , diagonalise( X ) ) ],
% 0.44/1.12     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.44/1.12    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.44/1.12     [ ~( operation( X ) ), function( X ) ],
% 0.44/1.12     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.44/1.12     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.44/1.12     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 1.02/1.42    'domain_of'( X ) ) ) ],
% 1.02/1.42     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 1.02/1.42     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 1.02/1.42    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 1.02/1.42    X ) ],
% 1.02/1.42     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 1.02/1.42     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 1.02/1.42    'domain_of'( X ) ) ],
% 1.02/1.42     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 1.02/1.42    'domain_of'( Z ) ) ) ],
% 1.02/1.42     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 1.02/1.42    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 1.02/1.42     ), compatible( X, Y, Z ) ],
% 1.02/1.42     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 1.02/1.42     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 1.02/1.42     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 1.02/1.42     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 1.02/1.42    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 1.02/1.42    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 1.02/1.42     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 1.02/1.42    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 1.02/1.42    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 1.02/1.42    , Y ) ],
% 1.02/1.42     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 1.02/1.42    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 1.02/1.42     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 1.02/1.42    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 1.02/1.42    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 1.02/1.42     [ ~( =( z, 'null_class' ) ) ],
% 1.02/1.42     [ ~( member( 'not_subclass_element'( z, 'null_class' ), z ) ) ]
% 1.02/1.42  ] .
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  percentage equality = 0.218579, percentage horn = 0.913978
% 1.02/1.42  This is a problem with some equality
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  Options Used:
% 1.02/1.42  
% 1.02/1.42  useres =            1
% 1.02/1.42  useparamod =        1
% 1.02/1.42  useeqrefl =         1
% 1.02/1.42  useeqfact =         1
% 1.02/1.42  usefactor =         1
% 1.02/1.42  usesimpsplitting =  0
% 1.02/1.42  usesimpdemod =      5
% 1.02/1.42  usesimpres =        3
% 1.02/1.42  
% 1.02/1.42  resimpinuse      =  1000
% 1.02/1.42  resimpclauses =     20000
% 1.02/1.42  substype =          eqrewr
% 1.02/1.42  backwardsubs =      1
% 1.02/1.42  selectoldest =      5
% 1.02/1.42  
% 1.02/1.42  litorderings [0] =  split
% 1.02/1.42  litorderings [1] =  extend the termordering, first sorting on arguments
% 1.02/1.42  
% 1.02/1.42  termordering =      kbo
% 1.02/1.42  
% 1.02/1.42  litapriori =        0
% 1.02/1.42  termapriori =       1
% 1.02/1.42  litaposteriori =    0
% 1.02/1.42  termaposteriori =   0
% 1.02/1.42  demodaposteriori =  0
% 1.02/1.42  ordereqreflfact =   0
% 1.02/1.42  
% 1.02/1.42  litselect =         negord
% 1.02/1.42  
% 1.02/1.42  maxweight =         15
% 1.02/1.42  maxdepth =          30000
% 1.02/1.42  maxlength =         115
% 1.02/1.42  maxnrvars =         195
% 1.02/1.42  excuselevel =       1
% 1.02/1.42  increasemaxweight = 1
% 1.02/1.42  
% 1.02/1.42  maxselected =       10000000
% 1.02/1.42  maxnrclauses =      10000000
% 1.02/1.42  
% 1.02/1.42  showgenerated =    0
% 1.02/1.42  showkept =         0
% 1.02/1.42  showselected =     0
% 1.02/1.42  showdeleted =      0
% 1.02/1.42  showresimp =       1
% 1.02/1.42  showstatus =       2000
% 1.02/1.42  
% 1.02/1.42  prologoutput =     1
% 1.02/1.42  nrgoals =          5000000
% 1.02/1.42  totalproof =       1
% 1.02/1.42  
% 1.02/1.42  Symbols occurring in the translation:
% 1.02/1.42  
% 1.02/1.42  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 1.02/1.42  .  [1, 2]      (w:1, o:55, a:1, s:1, b:0), 
% 1.02/1.42  !  [4, 1]      (w:0, o:30, a:1, s:1, b:0), 
% 1.02/1.42  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.02/1.42  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 1.02/1.42  subclass  [41, 2]      (w:1, o:80, a:1, s:1, b:0), 
% 1.02/1.42  member  [43, 2]      (w:1, o:81, a:1, s:1, b:0), 
% 1.02/1.42  'not_subclass_element'  [44, 2]      (w:1, o:82, a:1, s:1, b:0), 
% 1.02/1.42  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 1.02/1.42  'unordered_pair'  [46, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 1.02/1.42  singleton  [47, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 1.02/1.42  'ordered_pair'  [48, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 1.02/1.42  'cross_product'  [50, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 1.02/1.42  first  [52, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 1.02/1.42  second  [53, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 1.02/1.42  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 1.02/1.42  intersection  [55, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 1.02/1.42  complement  [56, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 1.02/1.42  union  [57, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 1.02/1.42  'symmetric_difference'  [58, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 1.02/1.42  restrict  [60, 3]      (w:1, o:92, a:1, s:1, b:0), 
% 1.02/1.42  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 1.02/1.42  'domain_of'  [62, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 1.02/1.42  rotate  [63, 1]      (w:1, o:35, a:1, s:1, b:0), 
% 1.02/1.42  flip  [65, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 1.02/1.42  inverse  [66, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 1.02/1.42  'range_of'  [67, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 1.02/1.42  domain  [68, 3]      (w:1, o:94, a:1, s:1, b:0), 
% 1.02/1.42  range  [69, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 1.02/1.42  image  [70, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 1.02/1.42  successor  [71, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 1.02/1.42  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 1.02/1.42  inductive  [73, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 1.02/1.42  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 1.02/1.42  'sum_class'  [75, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 1.02/1.42  'power_class'  [76, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 1.02/1.42  compose  [78, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 1.02/1.42  'single_valued_class'  [79, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 1.02/1.42  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 1.02/1.42  function  [82, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 1.02/1.42  regular  [83, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 1.02/1.42  apply  [84, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 1.02/1.42  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 1.02/1.42  'one_to_one'  [86, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 1.02/1.42  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 1.02/1.42  diagonalise  [88, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 1.02/1.42  cantor  [89, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 1.02/1.42  operation  [90, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 1.02/1.42  compatible  [94, 3]      (w:1, o:93, a:1, s:1, b:0), 
% 1.02/1.42  homomorphism  [95, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 1.02/1.42  'not_homomorphism1'  [96, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 1.02/1.42  'not_homomorphism2'  [97, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 1.02/1.42  z  [98, 0]      (w:1, o:29, a:1, s:1, b:0).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  Starting Search:
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  Intermediate Status:
% 1.02/1.42  Generated:    4628
% 1.02/1.42  Kept:         2008
% 1.02/1.42  Inuse:        114
% 1.02/1.42  Deleted:      4
% 1.02/1.42  Deletedinuse: 2
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  Intermediate Status:
% 1.02/1.42  Generated:    9368
% 1.02/1.42  Kept:         4023
% 1.02/1.42  Inuse:        190
% 1.02/1.42  Deleted:      15
% 1.02/1.42  Deletedinuse: 5
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  Intermediate Status:
% 1.02/1.42  Generated:    13361
% 1.02/1.42  Kept:         6039
% 1.02/1.42  Inuse:        244
% 1.02/1.42  Deleted:      18
% 1.02/1.42  Deletedinuse: 6
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  Done
% 1.02/1.42  
% 1.02/1.42  Resimplifying inuse:
% 1.02/1.42  
% 1.02/1.42  Bliksems!, er is een bewijs:
% 1.02/1.42  % SZS status Unsatisfiable
% 1.02/1.42  % SZS output start Refutation
% 1.02/1.42  
% 1.02/1.42  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  .
% 1.02/1.42  clause( 1, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y )
% 1.02/1.42     ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 90, [ ~( =( z, 'null_class' ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 91, [ ~( member( 'not_subclass_element'( z, 'null_class' ), z ) ) ]
% 1.02/1.42     )
% 1.02/1.42  .
% 1.02/1.42  clause( 92, [ subclass( X, X ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 105, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 114, [ subclass( z, 'null_class' ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 124, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 127, [ ~( subclass( 'null_class', z ) ), =( z, 'null_class' ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 151, [ ~( =( X, 'null_class' ) ), ~( subclass( z, X ) ), ~( 
% 1.02/1.42    subclass( X, z ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 155, [ ~( subclass( 'null_class', z ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 352, [ ~( subclass( X, z ) ), ~( =( X, 'null_class' ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 1691, [ ~( member( X, complement( 'universal_class' ) ) ), ~( 
% 1.02/1.42    member( X, Y ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 1717, [ ~( member( X, complement( 'universal_class' ) ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 1729, [ subclass( complement( 'universal_class' ), X ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 1756, [ ~( =( complement( 'universal_class' ), 'null_class' ) ) ]
% 1.02/1.42     )
% 1.02/1.42  .
% 1.02/1.42  clause( 1781, [ ~( =( X, 'null_class' ) ), ~( subclass( X, complement( 
% 1.02/1.42    'universal_class' ) ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 1782, [ ~( subclass( 'null_class', complement( 'universal_class' )
% 1.02/1.42     ) ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 6624, [ =( complement( 'universal_class' ), 'null_class' ) ] )
% 1.02/1.42  .
% 1.02/1.42  clause( 7045, [] )
% 1.02/1.42  .
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  % SZS output end Refutation
% 1.02/1.42  found a proof!
% 1.02/1.42  
% 1.02/1.42  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 1.02/1.42  
% 1.02/1.42  initialclauses(
% 1.02/1.42  [ clause( 7047, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 1.02/1.42     ) ] )
% 1.02/1.42  , clause( 7048, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 1.02/1.42    , Y ) ] )
% 1.02/1.42  , clause( 7049, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 1.02/1.42    subclass( X, Y ) ] )
% 1.02/1.42  , clause( 7050, [ subclass( X, 'universal_class' ) ] )
% 1.02/1.42  , clause( 7051, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , clause( 7052, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 1.02/1.42  , clause( 7053, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7054, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 1.02/1.42    =( X, Z ) ] )
% 1.02/1.42  , clause( 7055, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.02/1.42    'unordered_pair'( X, Y ) ) ] )
% 1.02/1.42  , clause( 7056, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.02/1.42    'unordered_pair'( Y, X ) ) ] )
% 1.02/1.42  , clause( 7057, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7058, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 1.02/1.42  , clause( 7059, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 1.02/1.42    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 1.02/1.42  , clause( 7060, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.02/1.42     ) ) ), member( X, Z ) ] )
% 1.02/1.42  , clause( 7061, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 1.02/1.42     ) ) ), member( Y, T ) ] )
% 1.02/1.42  , clause( 7062, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 1.02/1.42    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 1.02/1.42  , clause( 7063, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 1.02/1.42    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 1.02/1.42  , clause( 7064, [ subclass( 'element_relation', 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7065, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) )
% 1.02/1.42    , member( X, Y ) ] )
% 1.02/1.42  , clause( 7066, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 1.02/1.42    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 1.02/1.42  , clause( 7067, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7068, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7069, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 1.02/1.42    intersection( Y, Z ) ) ] )
% 1.02/1.42  , clause( 7070, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7071, [ ~( member( X, 'universal_class' ) ), member( X, 
% 1.02/1.42    complement( Y ) ), member( X, Y ) ] )
% 1.02/1.42  , clause( 7072, [ =( complement( intersection( complement( X ), complement( 
% 1.02/1.42    Y ) ) ), union( X, Y ) ) ] )
% 1.02/1.42  , clause( 7073, [ =( intersection( complement( intersection( X, Y ) ), 
% 1.02/1.42    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 1.02/1.42    'symmetric_difference'( X, Y ) ) ] )
% 1.02/1.42  , clause( 7074, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 1.02/1.42    X, Y, Z ) ) ] )
% 1.02/1.42  , clause( 7075, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 1.02/1.42    Z, X, Y ) ) ] )
% 1.02/1.42  , clause( 7076, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 1.02/1.42    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 1.02/1.42  , clause( 7077, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 1.02/1.42    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 1.02/1.42    'domain_of'( Y ) ) ] )
% 1.02/1.42  , clause( 7078, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7079, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.02/1.42    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 1.02/1.42     ] )
% 1.02/1.42  , clause( 7080, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T
% 1.02/1.42     ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 1.02/1.42    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.02/1.42    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 1.02/1.42    , Y ), rotate( T ) ) ] )
% 1.02/1.42  , clause( 7081, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7082, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 1.02/1.42    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7083, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T
% 1.02/1.42     ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 1.02/1.42    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 1.02/1.42    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 1.02/1.42    , Z ), flip( T ) ) ] )
% 1.02/1.42  , clause( 7084, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 1.02/1.42    'universal_class' ) ) ), inverse( X ) ) ] )
% 1.02/1.42  , clause( 7085, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 1.02/1.42  , clause( 7086, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 1.02/1.42    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 1.02/1.42  , clause( 7087, [ =( second( 'not_subclass_element'( restrict( X, singleton( 
% 1.02/1.42    Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 1.02/1.42  , clause( 7088, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 1.02/1.42    image( X, Y ) ) ] )
% 1.02/1.42  , clause( 7089, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 1.02/1.42  , clause( 7090, [ subclass( 'successor_relation', 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7091, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' )
% 1.02/1.42     ), =( successor( X ), Y ) ] )
% 1.02/1.42  , clause( 7092, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X
% 1.02/1.42    , Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 1.02/1.42    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 1.02/1.42  , clause( 7093, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 1.02/1.42  , clause( 7094, [ ~( inductive( X ) ), subclass( image( 
% 1.02/1.42    'successor_relation', X ), X ) ] )
% 1.02/1.42  , clause( 7095, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 1.02/1.42    'successor_relation', X ), X ) ), inductive( X ) ] )
% 1.02/1.42  , clause( 7096, [ inductive( omega ) ] )
% 1.02/1.42  , clause( 7097, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 1.02/1.42  , clause( 7098, [ member( omega, 'universal_class' ) ] )
% 1.02/1.42  , clause( 7099, [ =( 'domain_of'( restrict( 'element_relation', 
% 1.02/1.42    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 1.02/1.42  , clause( 7100, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 1.02/1.42    X ), 'universal_class' ) ] )
% 1.02/1.42  , clause( 7101, [ =( complement( image( 'element_relation', complement( X )
% 1.02/1.42     ) ), 'power_class'( X ) ) ] )
% 1.02/1.42  , clause( 7102, [ ~( member( X, 'universal_class' ) ), member( 
% 1.02/1.42    'power_class'( X ), 'universal_class' ) ] )
% 1.02/1.42  , clause( 7103, [ subclass( compose( X, Y ), 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7104, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 1.02/1.42    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 1.02/1.42  , clause( 7105, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 1.02/1.42    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 1.02/1.42    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 1.02/1.42     ) ] )
% 1.02/1.42  , clause( 7106, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 1.02/1.42    inverse( X ) ), 'identity_relation' ) ] )
% 1.02/1.42  , clause( 7107, [ ~( subclass( compose( X, inverse( X ) ), 
% 1.02/1.42    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 1.02/1.42  , clause( 7108, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 1.02/1.42    'universal_class', 'universal_class' ) ) ] )
% 1.02/1.42  , clause( 7109, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 1.02/1.42    , 'identity_relation' ) ] )
% 1.02/1.42  , clause( 7110, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 1.02/1.42    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 1.02/1.42    'identity_relation' ) ), function( X ) ] )
% 1.02/1.42  , clause( 7111, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), 
% 1.02/1.42    member( image( X, Y ), 'universal_class' ) ] )
% 1.02/1.42  , clause( 7112, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.02/1.42  , clause( 7113, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 1.02/1.42    , 'null_class' ) ] )
% 1.02/1.42  , clause( 7114, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y
% 1.02/1.42     ) ) ] )
% 1.02/1.42  , clause( 7115, [ function( choice ) ] )
% 1.02/1.42  , clause( 7116, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' )
% 1.02/1.42    , member( apply( choice, X ), X ) ] )
% 1.02/1.42  , clause( 7117, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 1.02/1.42  , clause( 7118, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 1.02/1.42  , clause( 7119, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 1.02/1.42    'one_to_one'( X ) ] )
% 1.02/1.42  , clause( 7120, [ =( intersection( 'cross_product'( 'universal_class', 
% 1.02/1.42    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 1.02/1.42    'universal_class' ), complement( compose( complement( 'element_relation'
% 1.02/1.42     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 1.02/1.42  , clause( 7121, [ =( intersection( inverse( 'subset_relation' ), 
% 1.02/1.42    'subset_relation' ), 'identity_relation' ) ] )
% 1.02/1.42  , clause( 7122, [ =( complement( 'domain_of'( intersection( X, 
% 1.02/1.42    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 1.02/1.42  , clause( 7123, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 1.02/1.42    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 1.02/1.42  , clause( 7124, [ ~( operation( X ) ), function( X ) ] )
% 1.02/1.42  , clause( 7125, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 1.02/1.42    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.02/1.42     ] )
% 1.02/1.42  , clause( 7126, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 1.02/1.42    'domain_of'( 'domain_of'( X ) ) ) ] )
% 1.02/1.42  , clause( 7127, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 1.02/1.42    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 1.02/1.42     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 1.02/1.42    operation( X ) ] )
% 1.02/1.42  , clause( 7128, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 1.02/1.42  , clause( 7129, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 1.02/1.42    Y ) ), 'domain_of'( X ) ) ] )
% 1.02/1.42  , clause( 7130, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 1.02/1.42    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 1.02/1.42  , clause( 7131, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) )
% 1.02/1.42    , 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 1.02/1.42    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 1.02/1.42  , clause( 7132, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 1.02/1.42  , clause( 7133, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 1.02/1.42  , clause( 7134, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 1.02/1.42  , clause( 7135, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 1.02/1.42    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 1.02/1.42    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7136, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.02/1.42    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 1.02/1.42    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 1.02/1.42    , Y ) ] )
% 1.02/1.42  , clause( 7137, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 1.02/1.42    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 1.02/1.42    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 1.02/1.42     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 1.02/1.42    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7138, [ ~( =( z, 'null_class' ) ) ] )
% 1.02/1.42  , clause( 7139, [ ~( member( 'not_subclass_element'( z, 'null_class' ), z )
% 1.02/1.42     ) ] )
% 1.02/1.42  ] ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7047, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 1.02/1.42     ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X ), :=( Y, Y ), :=( Z, Z )] ), 
% 1.02/1.42    permutation( 0, [ ==>( 0, 0 ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 1, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y )
% 1.02/1.42     ] )
% 1.02/1.42  , clause( 7048, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 1.02/1.42    , Y ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.02/1.42     ), ==>( 1, 1 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 3, [ subclass( X, 'universal_class' ) ] )
% 1.02/1.42  , clause( 7050, [ subclass( X, 'universal_class' ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , clause( 7051, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.02/1.42     ), ==>( 1, 1 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 1.02/1.42  , clause( 7053, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.02/1.42     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 22, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ] )
% 1.02/1.42  , clause( 7070, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 1.02/1.42     )
% 1.02/1.42  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 1.02/1.42     ), ==>( 1, 1 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 64, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.02/1.42  , clause( 7112, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 ), ==>( 1, 
% 1.02/1.42    1 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 90, [ ~( =( z, 'null_class' ) ) ] )
% 1.02/1.42  , clause( 7138, [ ~( =( z, 'null_class' ) ) ] )
% 1.02/1.42  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 91, [ ~( member( 'not_subclass_element'( z, 'null_class' ), z ) ) ]
% 1.02/1.42     )
% 1.02/1.42  , clause( 7139, [ ~( member( 'not_subclass_element'( z, 'null_class' ), z )
% 1.02/1.42     ) ] )
% 1.02/1.42  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  eqswap(
% 1.02/1.42  clause( 7291, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  eqrefl(
% 1.02/1.42  clause( 7292, [ subclass( X, X ) ] )
% 1.02/1.42  , clause( 7291, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 0, substitution( 0, [ :=( X, X ), :=( Y, X )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 92, [ subclass( X, X ) ] )
% 1.02/1.42  , clause( 7292, [ subclass( X, X ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  resolution(
% 1.02/1.42  clause( 7293, [ ~( member( Y, X ) ), member( Y, 'universal_class' ) ] )
% 1.02/1.42  , clause( 0, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ]
% 1.02/1.42     )
% 1.02/1.42  , 0, clause( 3, [ subclass( X, 'universal_class' ) ] )
% 1.02/1.42  , 0, substitution( 0, [ :=( X, X ), :=( Y, 'universal_class' ), :=( Z, Y )] )
% 1.02/1.42    , substitution( 1, [ :=( X, X )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 105, [ ~( member( X, Y ) ), member( X, 'universal_class' ) ] )
% 1.02/1.42  , clause( 7293, [ ~( member( Y, X ) ), member( Y, 'universal_class' ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, Y ), :=( Y, X )] ), permutation( 0, [ ==>( 0, 0
% 1.02/1.42     ), ==>( 1, 1 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  resolution(
% 1.02/1.42  clause( 7294, [ subclass( z, 'null_class' ) ] )
% 1.02/1.42  , clause( 91, [ ~( member( 'not_subclass_element'( z, 'null_class' ), z ) )
% 1.02/1.42     ] )
% 1.02/1.42  , 0, clause( 1, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 1.02/1.42    , Y ) ] )
% 1.02/1.42  , 0, substitution( 0, [] ), substitution( 1, [ :=( X, z ), :=( Y, 
% 1.02/1.42    'null_class' )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 114, [ subclass( z, 'null_class' ) ] )
% 1.02/1.42  , clause( 7294, [ subclass( z, 'null_class' ) ] )
% 1.02/1.42  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  eqswap(
% 1.02/1.42  clause( 7295, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  eqswap(
% 1.02/1.42  clause( 7296, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  resolution(
% 1.02/1.42  clause( 7297, [ ~( subclass( Y, X ) ), =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 1.02/1.42  , 0, clause( 7295, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 1, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 1.02/1.42    , X ), :=( Y, Y )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  resolution(
% 1.02/1.42  clause( 7299, [ =( Y, X ), ~( =( X, Y ) ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , clause( 7297, [ ~( subclass( Y, X ) ), =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , 0, clause( 7296, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 1.02/1.42  , 1, substitution( 0, [ :=( X, Y ), :=( Y, X )] ), substitution( 1, [ :=( X
% 1.02/1.42    , X ), :=( Y, Y )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  eqswap(
% 1.02/1.42  clause( 7301, [ ~( =( Y, X ) ), =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , clause( 7299, [ =( Y, X ), ~( =( X, Y ) ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , 2, substitution( 0, [ :=( X, Y ), :=( Y, X )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  factor(
% 1.02/1.42  clause( 7303, [ ~( =( X, Y ) ), =( Y, X ) ] )
% 1.02/1.42  , clause( 7301, [ ~( =( Y, X ) ), =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , 0, 2, substitution( 0, [ :=( X, Y ), :=( Y, X )] )).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  subsumption(
% 1.02/1.42  clause( 124, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 1.02/1.42  , clause( 7303, [ ~( =( X, Y ) ), =( Y, X ) ] )
% 1.02/1.42  , substitution( 0, [ :=( X, Y ), :=( Y, X )] ), permutation( 0, [ ==>( 0, 1
% 1.02/1.42     ), ==>( 1, 0 )] ) ).
% 1.02/1.42  
% 1.02/1.42  
% 1.02/1.42  resolutioCputime limit exceeded (core dumped)
%------------------------------------------------------------------------------